CC [M]  drivers/scsi/scsi_transport_fc.o
drivers/scsi/scsi_transport_fc.c: In function `fc_stat_show':
drivers/scsi/scsi_transport_fc.c:634: warning: long long unsigned int format, long unsigned int arg (arg 4)

To us %llx on a 64 bit platform we have to cast u64 to 
unsigned long long.
Signed-off-by: James Bottomley <James.Bottomley@SteelEye.com>